We are upgrading our server (SBS 2003, 5 year old server) to a Enterprise Server 2008 R2 with Exchange 2010. The firm we have enlisted to assist with the migration has suggested we don’t try and migrate but rather create a new domain and then bring stuff across. I don’t know a lot about it, but he is using Exmerge to transfer mailboxes from the old server into the new server, which is fine. The worry that I have is that calendar invites which are currently in, will have their link broken in the new setup, as users + resources are recreated (and I think they are referred to by an ID rather than email address?). Preliminary testing of a couple of mailboxes seemed to suggest this is the case (though could be some other issue that we are facing).
Do you have any advice on how to get exmerge to retain the correct references, so that when I update a meeting request with me, Bob and the Staff Room, they all get the updated request? Is there any utilities to use, or some technique?